Table.1.
UV characteristics, LC/MS/MS characteristics, conversion factors (K) of glucuronides and sulfates of selected mono-hydroxylfavones and dihydroxyflavones. The metabolic positions of metabolites were determined by UV characteristics of relevant HFs.
| Flavones | Glucuronides | Sulfates | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV λmax, nm | Position | TW | K | UV λmax, nm | GCI in LC/MS/MS | Position | TW | K | UV λmax, nm | SCI in LC/MS/MS | ||||||
| Band I | Band II | Band I | Band II | [M+H]+ | [M−G+H]+ | Band I | Band II | [M+H]+ | [M−S+H]+ | |||||||
| 2’-HF | 323.9 | 254.9 | 2’-O-G | 254 | 1.26±0.08& | 321.5 | 254.9 | 415 | 239 | 2’-O-S | 254 | 0.72±0.06 | 319.2 | 253.7 | 319 | 239 |
| 3’- HF | 298.9 | 240.7 | 3’-O-G | 254 | 0.93±0.02& | 301.3 | 256.1 | 415 | 239 | 3’-O-S | 254 | 1.40±0.09 | 306.0 | 243.1 | 319 | 239 |
| 4’- HF | 324.2 | 252.5 | 4’-O-G | 254 | 1.16±0.02& | 318.0 | 253.7 | 415 | 239 | 4’-O-S | 254 | 1.21±0.05 | 315.7 | 253.7 | 319 | 239 |
| 3-HF | 343.8 | 239.5 | 3-O-G | 254 | 0.96±0.06& | 309.2 | 247.8 | 415 | 239 | 3-O-S | NA | NA | ||||
| 5- HF | 335.8 | 269.1 | 5-O-G | 254 | 0.84±0.13& | 324.1 | 262.0 | 415 | 239 | 5-O-S | 254 | 1.52±0.03 | 294.1 | 257.3 | 319 | 239 |
| 6- HF | 304.8 | 268.0 | 6-O-G | 254 | 0.99±0.03& | 306.0 | 260.8 | 415 | 239 | 6-O-S | 254 | 1.59±0.04 | 306.0 | 257.5 | 319 | 239 |
| 7- HF | 309.0 | 252.3 | 7-O-G | 254 | 0.96±0.03& | 309.0 | 252.3 | 415 | 239 | 7-O-S | 254 | 0.98±0.04 | 308.4 | 252.5 | 319 | 239 |
| 3,4’- diHF | 356.9 | 232.4 | 3-O-G | 254 | 1.02±0.03& | 334.7 | 232.4 | 415 | 239 | 3-O-S | NA | NA | ||||
| 4’-O-G | 254 | 0.87±0.03& | 352.1 | 246.6 | 431 | 255 | 4’-O-S | 355 | 1.06±0.076 | 348.5 | 246.6 | 335 | 255 | |||
| 3,7- diHF | 343.8 | 252.5 | 3-O-G | 263 | 1.29±0.03& | 314.4 | 251.4 | 431 | 255 | 3-O-S | NA | NA | ||||
| 7-O-G | 254 | 0.86±0.09& | 341.5 | 250.2 | 431 | 255 | 7-O-S | 340 | 0.97±0.08 | 341.5 | 246.6 | 335 | 255 | |||
| 4’,7- diHF | 331.1 | 253.7 | 4’-O-G | NA | NA | 4’-O-S | 254 | 1.01±0.014 | 314.4 | 253.7 | 335 | 255 | ||||
| 7-O-G | 254 | 1.09±0.04 | 331.1 | 252.5 | 431 | 255 | 7-O-S | 254 | 1.18±0.04 | 331.1 | 252.5 | 335 | 255 | |||
| 5,7- diHF | 312.2 | 266.8 | 7-O-G | 254 | 1.16±0.02 | 306.2 | 266.8 | 431 | 255 | 7-O-S | 254 | 1.45±0.10 | 308.1 | 268.0 | 335 | 255 |
| 6,7- diHF | 316.8 | 266.8 | 6-O-G | 309 | 1.61±0.14 | 314.4 | 264.4 | 431 | 255 | 6-O-S | NA | NA | ||||
| 7-O-G | 309 | 1.22±0.11 | 312.2 | 264.4 | 431 | 255 | 7-O-S | 309 | 1.21±0.76 | 312.0 | 266.8 | 335 | 255 | |||
&
Using published data (20), TW: Test Wavelength (nm), GCI: Glucuronide characteristic ions, SCI: Sulfate characteristic ions, NA: not available due to low intensity of the peak.